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Blind No More?

FDA has given biotech company Advanced Cell Technology the go-ahead to test a treatment for macular degeneration using human embryonic stem cells in a clinical trial, says Jennifer Welsh at the 80beats blog. Researchers at Advanced Cell Technology suggest that implanting hESCs in these patients could end retinal pigment epithelial cell death and reverse blindness; using this approach, the team saw improved vision in rats, Welsh says. The first trial will include 12 patients to determine the safety and tolerability of transplanting hESCs for this purpose, she adds. Advanced Cell Technology had also previously been approved to conduct a similar trial on patients with a rare juvenile form of the disease.

The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.